Advise me on AWS Cloudformation. Should be very easy for anyone with medium to good expertise.

Advise me on AWS Cloudformation. Should be very easy for anyone with medium to good expertise.

I'm building an autoscaling group behind a LB cluster, and need to put an sns topic in there that emails me when the average cpu utilisation is over 70%, for the autoscaling group or cluster. Not sure how to do this. Should be easy for any experienced cloudformation engineer. The key skill is AWS CLOUDFORMATION! Thanks, Andrei